Wrench



J. C. PIECHOCKI AND E. K. BOINSK I.

WRENCH. APPLICATION FILED JUNE l1, I92I.

Patented Dec.5, 1922.

OO OOOOOO INVENTOR ATTORNEY wrmEssrs Patented Dec. 5, 192,2.

pa rosmug;

' j g 1 1,437,774 PATEN 'oFFlcE.

c Joan, o. rrnonocnrnnnnnmulvp BoINs'KI, or BUFFALO, NEW roan Y WRENCH.

A Application filedJ'nne 11, 1921. semi No.476,893.

To all whom it may concern: 1

Be it known that we, Jenn C; PIECHOCKI and EDMUND K; BoINsKI, c1t1zens of the United States, residing at Buffalo, in the county of'Erie and State ofNew York, have invented new and useful' lmprovements in Wrenches, of whichthe following-is a specification. i

Our present invention hasreference to im provements in monkey wrenches I )ur object is to producea wrench of a simple constructiomstrong and durable, and

wherein the movable aw may be quickly adjusted with respect to the stationary aw vand with respect to the object to be engaged by thejaws. Other-objects and advantages will present themselves as the nature of the invention is Figure 2 is a sectionalview on the line,

Figure 3 is a sideelevation-of a slight modification.

Figure 4 18 a 560171011211 view on an enlarged scale and on the line 4-4 of Figure 8.

Referring now to the drawings in detail, the numeral 1 designates the stationary aw of our wrench, the same having a laterally extending shank 2. The shank, in the present instance, has its sides providedwith a series of longitudinally arranged spaced apertures 3.

Arranged for movement on theshank 2 is a carriage d that has its end provided 1 with a jaw 5. The jaw 5 is, of course, arranged next to the jaw 1. The carriage has a substantially T-shaped opening there through, the longitudinalbranch 6 of which being disposed opposite the apertured sides of the shank 2, while the second branch 7 thereofextends beyo'ndone of the edges of the shank 2. In the longitudinal branches of the T-shaped slots are the straight body portions 8 of dogs 9. The teeth of the dogs are designed to be received in certain of the apertures 3 of the shank 2. The body portions have angular extensions 10, each of which is provided with an ear 11,0ne ear ing the respective dogs. e ne of the dogs is a wrench con.

' arranged on each side of the carriage 4-, and

the right angular portionlO of each of the dogshas at its end a straight projection 13', the said projection having its outer portion rounded, as at Hand projecting through the branch 7 of the angle slots. The porv tions 13 have arranged therebetween a pres- I sure spring 15, the sameexerting a tension against the said portions, swing the dogs r on their pivots and. swing the active or toothed surface 9 thereof into the apertures G of the shank 2. The rounded portions 14% of the handles permit of the operator exerting. a pressure thereagainst to swing the dogs away fromeach other and thus release the movable jaw from the shank of the fixed-jaw. Preferably, the ends of the springs 15 are received in depressions in the portions 13 of the dogs, and'itlis believed that the foregomg description, when taken in connection with the drawings will fully set forth the constructionandadvantages of the improvement. o v

The foregoing construction refers particularly to Figures 1 and 2 of the drawings. In Figures 3 and 4:, the stationary jaw 20 has its shank 21 provided with spaced transverse depressions, forming therebetween teeth 22. 5 I

The movable jaw 23 has a carriage 24 which is slidable on the shank 21.

The sides of the carriage24' are provided with substantially T-shaped openings. In the shorter branch of these openings there are received the reduced portions 25 of dogs 26. The portions 25, on their inner faces have inwardly disposed cars 27 which are pivotally connected, as at 28, and the outeresurface of the said portions 25 are enlarged to provide finger holds 29. Between these finger holds there is a helical spring 30 that forces the dogs in the openings or pockets provided therefor. The ends of the dogs, op-

posite that provided with the finger holds 29 are each formed with a lateral extension 31,

that has its ends terminating in parallel arms :32, and between these pairs of arms there is a shaft 33 on which there is free mounted a screw wheel 84:. The depressions between the teeth 21 are concaved, and the screw ;wheels'34c are snugly received in the said deof engagementwith the teeth 22 sothat the jaw 23 may ,befquickly moved 1n"leither div rection on the shank 21 to engage an object,

between the, said. jaw nd h d ly-v 9 Thereafter'by merely turninlgthe'screws the jaw 23 will be brought further towardthe i jaw 20, and more efi'ectively apertures, a carriage,slidable;v on. the shank and cariying a jaw, said shank having angle openings, the longitudinal branches of which communicating with the bore ofthe carriage andinva linewith thefapertured sides ofthe,

shank, and the second branch of theilsaid opening, being extended beyond". one of the edges of the slianlndogs' in the longitudinal branch of each of the openings and having teeth toengage withthe apertures of-the'.

shank, said dogs having? angle portions .ex-

tending in the second'branch of the opening and provided with inwardly directed lap ping ears, a pivot member passingthrough the ears, angle handle portlons formed on the ends of thedogs having ou'ter rounded engage with in" portions, which project, through, the said branch of the opening, and a pressjureispring getweenthe last mentioned portions of the 2 ."A wrench including a stationary jaw having an angle shank whose sides are depressed to provide teeth between said depressions ajaw having a movable carriage which is slidable on the shank, said carriage having its, sides provided with T shapeduopenings which communicate with its bore "andthe 'shorterrpassage of the openin-g forming,vaTnotch below the, bore, dog's having reduced" ends, arranged in the, shorter, branch ,of the. T-shaped ,openings, .1nwardly' extending lugs. on the dogs. which are pivot? ally connected, springs between the said ends ofthe dogs for forcing the same in the openings eachdog having a lateral extensionaarranged in; the wider branchof the T-shaped opening, and said extensions terminating in parallel flanges, a shaft secured between the flanges, and a screw free mount-.

ed on eachishaft and ;norn1 ally in engagenient with the teeth of the shank.

In testimony whereof we afiix our signatures JOHN C, PIECHOCKL K. 'BQINSKL 

